Dot Net Examples: DataView ToTable method to create a new DataTable in ado.net

DataViewToTableMethod.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
DataTable dt = new DataTable();
dt.TableName = "Books";

DataColumn dc1 = new DataColumn();
dc1.ColumnName = "BookID";
dc1.DataType = typeof(int);
dc1.AllowDBNull = false;
dc1.Unique = true;

DataColumn dc2 = new DataColumn();
dc2.ColumnName = "Category";
dc2.DataType = typeof(string);

DataColumn dc3 = new DataColumn();
dc3.ColumnName = "BookName";
dc3.DataType = typeof(string);

DataColumn dc4 = new DataColumn();
dc4.ColumnName = "Author";
dc4.DataType = typeof(string);

dt.Columns.AddRange(new DataColumn[] { dc1, dc2, dc3, dc4 });

dt.Rows.Add(new object[] { 1, "iPhone", "iPhone User Interface Cookbook: RAW", "Cameron Banga" });
dt.Rows.Add(new object[] { 2, "MySQL", "MySQL 5.1 Plugin Development", "Andrew Hutchings, Sergei Golubchik" });
dt.Rows.Add(new object[] { 3, "MySQL", "MySQL Admin Cookbook", "Daniel Schneller, Udo Schwedt" });
dt.AcceptChanges();

Label1.Text = "Source DataTable";
GridView1.DataSource = dt.DefaultView;
GridView1.DataBind();

//this line create a new DataView
DataView dView = new DataView(dt);
dView.RowFilter = "Category = 'MySQL'";

Label2.Text = "Here we create a new DataView<br />" +
"and set the RowFilter (Category = 'MySQL')";

GridView2.DataSource = dView;
GridView2.DataBind();

//this line create a new DataTable from DataView
DataTable dt2 = dView.ToTable();

Label3.Text = "Here we create a new DataTable from DataView";
GridView3.DataSource = dt2;
GridView3.DataBind();
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>How to use DataView ToTable method to create a new DataTable in ado.net</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:DarkBlue; font-style:italic;">
How to use DataView ToTable method
<br /> to create a new DataTable in ado.net
</h2>
<hr width="450" align="left" color="CornFlowerBlue" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView1"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<br />
<asp:Label
ID="Label2"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView2"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<br />
<asp:Label
ID="Label3"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView3"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Populate GridView"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>

Dot Net Examples

Sunday, May 15, 2011

DataView ToTable method to create a new DataTable in ado.net

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